[LyX/master] Add comment

[Juergen Spitzmueller]

commit abefdcaf309554ae9ea506affcb84e6c0219128c
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Thu May 28 13:34:58 2015 +0200

    Add comment

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index 01d9b95..3ebfdb1 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -1747,6 +1747,9 @@ bool GuiView::getStatus(FuncRequest const & cmd, 
FuncStatus & flag)
           application can still be accessed without giving focus to
           the main window. In this case, we want to disable the menu
           entries that are buffer-related.
+          This code must not be used on Linux and Windows, since it
+          would disable buffer-related entries when hovering over the
+          menu (see bug #9574).
         */
        if (cmd.origin() == FuncRequest::MENU && !hasFocus()) {
                buf = 0;